When you first click into the website, you select the location 'Hong Kong' then press GO.
Then you will see a page with a window in the middle showing your computer's file structure (very similar to those that being shown in File Explorer), beside that window is a big button '開始掃描'. Click the drive that you want to scan in that middle window, then press the big button......
(1) Ensure your virus definitoin is up-to-date. Otherwise you have to run Live Update for the avast.
(2) Go to below web-page and download the whole page for instruction. Click Here
Click w32 Gaobot and save the page. Disconnect from internet. Turn off your modem. Follow the instruction in that page.
(3) Upon completion, scan again with avcast and adware. Hope they can remove the virus now.
(4) Reboot, reconnect the modem and perform online scan again.